sixserve

You'll have to find where wordpress is including wp-config.php, and change it to ../wp-config.php

Use magpierss - http://magpierss.sourceforge.net/

Is this a custom coded site or what? If so, just make a subscriptions table with user ids and emails. Every time a user posts, find all subscriptions with their user id, and loop through the results and send an email to each one.

Your best bet is to choose one form, and set the other cookie appropriately, or have it post the other form automatically.

I don't think phpbb3 has an api, just a database call to add them to whatever table lists user's groups.